My puppy is home from the vets office where he was treated for Parvo. The vet said he was eating and drinking there, however since he's been home, he hasn't touched his food or water bowl, should I be worried or is this normal for them to go through?

Did you just bring him home today? If so it could be that he filled up at he clinic before he came home.
Also were you sent home with a prescription bland diet for him to eat?
He may be a little slow to eat with gusto like he would have normally considering what parvo virus does to the body. His digestive system is healing and he may still have times when he just doesn't feel that well.
What kind of dog?
Sorry for all the questions, just trying to get a little more info.
How does he seem to you otherwise? How is his attitude, playful, a little depressed?